Typewriter attachment



Patented June 18, 1935 UNITE-o STATES 1 Claim.

roots-as TYPEWRITER ATTACHMENT David Friesel, United States Army,

Washington, D. C.

' Application July 3, 1933, Serial No; 678,898

(Granted under the act or March 3,1883, as

amended April 30, 1928;370 0. G. 757) The invention described herein, ifpatented, may be manufactured and used by or for the Government forGovernmental purposes without payment of; any. royalty thereon.

This invention relates to an improved attachment for typewriters or thelike, and more particularly to an article of manufacture adapted to beapplied to any. of the various forms of said znachinesfor the purpose ofretaining the paper after leaving the platen, in proper position andprevent its being blown toward the operator into a position to obscurethe work, cause the paper to be soiled or prevent the proper functioningof parts of the machine.

One-of the objects of this invention is to provide an attachment thatmay be promptly applied to or removed from any of the presenttypewriting machines.

Another object is to provide adevice. having.

mounting means that may be applied to a con- Venient partof" a machinewithout requiring the services of an expert, the use of any tools, orthe necessity of any change in the machine, such as the boring of holesor cutting away of any parts of the machine.

A further object is to provide a device of simple, durable andinexpensive construction that will permit its application to a machineand its operation will be quickly understood, one having few parts ofsturdy construction that will stand rough usage and may be produced atvery little cost from stamped metal, requiring no machine work, and yetbe as effective as devices for the same purpose of a more complicatedand expensive character.

The above and other objects will be hereinafter more fully pointed outin the following specification and drawing and finally set forth in theclaim, it being understood that changes in form and minor details ofconstruction may be resorted to without departing from the spirit of theinvention or falling beyond the scope of the claim.

Similar numerals indicate corresponding parts in all the figures of thedrawing in which:

Fig. 1 is a front View of a fragment of a typewriter carriage with myimproved paper guard applied.

Fig. 2 is a side view partly in section of the parts shown in Fig. 1with a sheet of paper in place beneath the guard.

Fig. 3 is an enlarged detail perspective view of the preferred form of.the device.

Fig. 4 is a detail section of the hinge connection between the guard armand. its support.

Fig; 5-is anlenlargeddetail perspective view of: the" clamping means atthe base of the supporting memberofthe device.

Fig. 6 isaview similar to Fig. 5, of a modified form of clamping imeans.

Fig. '7 is a similar view of another modified form of clamp. 1

Fig. 8 is a modified form of the device, wherein the guard armlanditssupport are formed integral, and: the modified formclamp shown inFig. 5 maybe used.-

Reference now being had-to the drawing, l indicates the platen, Zthepaper table and 3 the paper guide of. atypewriter.

The improvedpaper guard is usually mounted on the'upturned'edge 4 ofthepaperguid'e. 3 and consists of the supporting orimountingmemberprovided with a clamp at its, base adaptedtobe detachably secured tosaid'edge 4 in.such;a..man,-. ner as to firmly hold the mountingmemberiiin anuprightposition; I

The clamp at the base of the. mounting member consists of a jaw 6mounted near the lower end of support 5 and extending paralleltherewith, to provide a space in which is mounted a spring metalfriction member 1, adapted, when forced down over the upturned edge 4 ofthe paper guide, or other similar part of the carriage, to maintain thesupporting member firmly in position.

At the upper end of supporting member 5, is hinged at 8, the guard arm9. Said hinge is formed by cutting away the central portion of the upperend of member 5,,and turning its.

extending ends into sockets in for the reception of hinge pin II. Theguard arm 9 is provided with a socket I2 at its hinged end for thereception of pin II, thus forming the hinged connection referred to. Thebase of the cut-away portion in member 5 is so located as to form a stop[3 with which arm 9 comes into contact, to maintain the arm in ahorizontalposition while in its operative position over the carriage.

The hinge permits a free outward swing of the arm, thus providingunobstructed access to the work when necessary. I

The above parts are shown and described specifically for purposes ofillustration only, it being understood that slight changes may be foundexpedient. For instance, it may be considered advisable under certainconditions to provide a shorter supporting arm, and have the guard armrest on more or less of an incline, or the arm 9 be slightly curved,instead of a. straight arm. arranged horizontally as shown.

Ordinarily the guard arm extends approximately one-half the width of thepaper, but may be of greater length if desirable. Said length willprovide the required results with the usual work suchas letter writing,wherein the upper or outer sheet is the original, is of relatively heavypaper, and if the arm extends only partly across same, it will, due tothe stifiness of the paper, retain the full width of said origiin arearwardly inclined position "throughout" the remainder of the work.-Should, access to the original and carbons be necessary for an erasureor for other purposes, the arm may be swung back, and the sheets ofpaper be entirely released from beneath same. H

Arm 9 may be of relatively light Weight, for the reason that when thepaper is blown toward the operator, it presses against the arm and tendsto overlap and not, lift the arm and further, the pressure exerted bythe paper when blown against the arm is at right angles to the swing ofthe arm, therefore even when the'currents of airare very strong, the arm"will not release the paper, unless lifted by hand- Fig. 6 shows amodified form of clamp at base of supporting member 5, wherein aclamping bolt l5 having a knurled head I6 is threaded through the jawmember 6 and functions in a manner corresponding to that of thefrictional spring member I. of Fig. 5.

Fig. 7 is another modified form of means. for

provide a clamp to be attached to a 'line while over the machine.

mounting 'the device and consists of a spring pressed swinging jaw l1adapted in cooperation with the lower end of supporting member 5, topart of the typewriter.

Fig. 8 is a modified form of the device wherein the supporting armia.andv guard arm 9a are formed integral, the clamp at base of supportingmember being that shown in Fig. 6.

This device may be constructed entirely of stamped metal parts, at verylow cost, and may be applied to or removed from a machine instantly, infact the form shown in Fig. 8 is entirely satisfactory due to said quickapplication and removal to and from position, it being obvious thatshould an erasure on the work be required, the device can be slipped offofthe machine, the corrections made, and the device again adjusted inplace in less time than is required to adjust the paper in some of theguards now on the market.

Having fully described my invention, what I claim and desire to secureby Letters Patent is:

The combination'with a typewriting machine having a carriage, a platenand a paper guide provided with an upturned portion, of a guardconsisting of a supporting member removably mounted on said upturnedportion'adapted to occupy a position with relation to the left hand edgeof the paper, regardless of its width, said member extending in anupright direction, a

guard arm hingedly mounted at the upper end' of said supporting memberand adapted to extend over said platen to cause the paper to ex tendrearwardly upon leaving the platen, or be swung free of the machine torelease said paper,

and means carried by said supporting member to prevent the arm fallingbelow DAVID FRIESEL.

a horizontal

